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# What is a billion?

Answer It depends where you live. There are two systems for naming large numbers: the long scale and the short scale. The short scale is employed in the USA, the UK and many …other countries prefer the long scale. In the USA, a billion denotes one thousand million: 1 000 000 000 or 10 9 The long scale is employed elsewhere, and so a billion equals a million million: 1 000 000 000 000 or 10 12 (MORE)